@... I have a partial workaround. While this example does not get you the ability to have a specific custom message sent to the requester from the Sales person, It does allow the light agent to send an email to the requester to let them know that the Sales person is aware of the ticket and helping to work towards a resolution.

Create a set of macros (one for each Salesperson) where each macro has a multiple choice set of titles to preset responses that can be sent to the requester. When the sales person uses the macro, a unique text string is put into a private comment.

Triggers are created, one for each response type (looking for those unique text strings as the trigger) for each salesperson. The trigger sees the unique text string in the private comment and can then cause an email to be sent to the requester with a much more detailed preset message from the sales person. Each trigger's email can be customized to the type of reply the sales person wants to send the requestor. The email content can even be 'signed' by the sales person.

The email the requester gets lets them know that the sales person is aware of the ticket and is taking some action (that you define).

If needed, the sales person can then follow up directly with the customer via text, phone, email, etc. (outside of Zendesk) for any personal attention required.

You could create many types of prepared responses that while 'canned', helps the customer know that their salesperson is actively involved.

With this same basic formula, a light agent can also affect change and workflow in the ticket by using pre-created macros and triggers designed to change the settings of custom drop-down fields in the ticket.

I hope this helps. With creative uses like this, it gives our light agents more capabilities than just a private comment. We call this Light Agents Plus (about half way between the default capability of a light agent and that of a full agent).

If you need an actual macro & trigger example of how to do this, let me know.

Andrew